Another vote for the Camelbak bottles. They're made of some special Carlos Fandango plastic, so they don't make the water taste foul like every other plastic bottle I've ever used. I've always found the alloy ones a bit poor on the bike due to the above lack of squeezeability and the fact that they look terrible once they've slid down the road / been taken in and out of a muddy bottle cage a few times.
Another vote for the Camelbak bottles. They're made of some special Carlos Fandango plastic, so they don't make the water taste foul like every other plastic bottle I've ever used. I've always found the alloy ones a bit poor on the bike due to the above lack of squeezeability and the fact that they look terrible once they've slid down the road / been taken in and out of a muddy bottle cage a few times.